1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * dcache.h 5 * 6 * Function prototypes 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 */ 25 26 #ifndef OCFS2_DCACHE_H 27 #define OCFS2_DCACHE_H 28 29 extern const struct dentry_operations ocfs2_dentry_ops; 30 31 struct ocfs2_dentry_lock { 32 /* Use count of dentry lock */ 33 unsigned int dl_count; 34 union { 35 /* Linked list of dentry locks to release */ 36 struct ocfs2_dentry_lock *dl_next; 37 u64 dl_parent_blkno; 38 }; 39 40 /* 41 * The ocfs2_dentry_lock keeps an inode reference until 42 * dl_lockres has been destroyed. This is usually done in 43 * ->d_iput() anyway, so there should be minimal impact. 44 */ 45 struct inode *dl_inode; 46 struct ocfs2_lock_res dl_lockres; 47 }; 48 49 int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode, 50 u64 parent_blkno); 51 52 extern spinlock_t dentry_list_lock; 53 54 void ocfs2_dentry_lock_put(struct ocfs2_super *osb, 55 struct ocfs2_dentry_lock *dl); 56 57 void ocfs2_drop_dl_inodes(struct work_struct *work); 58 void ocfs2_drop_all_dl_inodes(struct ocfs2_super *osb); 59 60 struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno, 61 int skip_unhashed); 62 63 void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target, 64 struct inode *old_dir, struct inode *new_dir); 65 66 extern spinlock_t dentry_attach_lock; 67 void ocfs2_dentry_attach_gen(struct dentry *dentry); 68 69 #endif /* OCFS2_DCACHE_H */ 70